Truck-frame.



H. M. PFLAGER.

TRUCK FRAME.

APPLICATION FILED SEPT. 17,1912.

1,097,819. PatentedMay26,1914.

2 SHEETS-SHEET 1. v

H. M. PFLAGER.

TRUCK FRAME.

APPLICATION FILED SEPT. 17,1912.

Patented May 26, 19141 2 $HEETSSHEET 2.

.Znventor; Ha] 'ryMP flaga; Q L

pertains to channel-shaped HARRY M. PFLAGER, OF ST. LOUIS, 'MISSOURI,

ASSIGNOR TO DOUBLE BODY BOLSTER COMPANY, OF ST. LOUIS, MISSOURI,ACOBYORATION OF NEW JERSEY.

TRUCK-FRAME.

Specification of Letters Patent.

Application filed September 17, 1912. Serial No. 720,854.

concern r I, HARRY M. PFLAGER, a citizen of the United States, residingat St. Louis, Missouri, have invented a certain new and usefulImprovement in Truck- Frames, of which the following is a. full, clear,and exact description, such as will enable others skilled in the art towhich it apmake and use the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure l is a top plan view, partly broken away, of a four-wheel truckframe constructed in accordance with my invention. Fig. 2 is a sideclevational view and vertical, longitudinalsectional view taken on line2-2 of Fig. 1. Fig. 3 is a vertical cross-sectional To all whom'it mayBe it known that view taken on line 33 of Fig. 1. Fig. 4

is an end elevation and vertical cross-sectional view taken on line 44of Fig. 1. Fig. 5 is a detail sectional view of a modified form ofstirrup-hanger connection.

This invention relates to car trucks and i has for its object to providea fourwhcel truck frame that is light, strong, inexpensive tomanufacture and, one which has a comparatively narrow wheel base.

Referring to the drawings which illustrate the preferred form of myinvention, A

designates a one-piece casting which comprises a pair of wheel pieces 1and two single transoms 2 that connect said wheel pieces together. Thewheel pieces 1 may be in cross section or boxshaped. The pedestals B ofthe truck are removable, and at the points where they are detachablyconnected to the wheel. pieces 1, the securing bolts or rivets may passthrough the vertical webs b of said wheel pieces that are integrallyconnected to the horizontal flanges a, thus producing boxshaped portionswhich are embracedby the upper ends of the pedestals B and through whichthe fastening devices 8 pass, as shown in Fig. a. By forming the wheelpieces in this manner I obtain an exceptionally strong and rigid truckframe, for the vertical webs Z) reinforce those portions of the wheelpieces 1 which are subjected to great strains, and they also brace thepedestals and the fastening devices which secure the pedestals to thewheel pieces.

The wheel pieces 1 are provided on their under-sides with integralspring seats or Fig.

pockets 4 which receive the upper ends of the springs Cv that areinterposed between the wheel pieces and the equalizers D. Said springseats 4: are of greater diameter than the width of the horizontal braceof the wheel pieces and consequently project laterally in oppositedirections from said wheel pieces, as shown in Fig. 3. The portions ofsaid spring seats which project outwardly from the wheel pieces arereinforced and strengthened by vertical webs 5 which are integrallyconnected to the spring seats and to the vertical and horizontal membersof the wheel pieces 1; and the portions of said spring seats whichproject inwardly from the wheel pieces are reinforced and strengthenedby the transoms 2 through which they are integrally connected, as shownin Fig. 3. The transoms Qare so designed and arranged that the truck ispractically as strong as a truck provided with double transonis on eachside of the bolster, thereby reducing the weight of the truck, the costof manufacture and the length of the wheel base. Said transoms 2 arespaced apart from the center of the bolster E so as to locate the outervertical web of each transom nearly mid-way between the bolster andthewheel axles F, as shown in Fig. 1, and each transom consists of arelatively narrow intermediate or central portion and two relativelywide end portions that cooperate with the end portions of the othertransom and guide the bolster and prevent it from swaying. The t-ransoms2 may be-channel-shaped in cross section, as shown in Fig. 2, comprisingweb and flange members, said flange members being connected to thehorizontal members 0; of the wheel pieces and the vertical webs ti ofsaid transoins being integrally connected at their outer ends to thevertical webs of the wheel pieces 1. I prefer to flare the top flangesof transoms 2 outwardly, as shown in Fig. 1, so as to form gussets 7 atthe intersections of the top flanges of the transoms and wheel pieces.

The wide end portions of the transoms are spaced just far enough apartto receive the bolster E, and the vertical webs of the wide portions ofsaid transoms are provided with chafing plates 6, as shown in 3. thatcotiperate with chafing plates 6 on the bolster, as shown in Fig. 1. Thespring plank 8 which-supports the springs Patented May 26, 1914..

H onwhich the bolster rests is carried by links 8 which may havebifurcated upper ends to straddle depending ears or lugs 9 ontheunderside of the transom 2, as shown in Fig. 5, or said links may extendup through an opening between the vertical webs of the transom 2 forengagement with the pin 10, as shown in Fig. 1.

A four-wheel truck frame of the construction above described'is light inweight and is practically as strong as a cast metal truck having twot-ransoms on each .side of the bolster, forthe reason that the singletransoms shown, or at least the outer vertical Webs thereof, are locatedapproximately midway between the bolster and the wheel.

axles. The way in which the pedestals are connected to the wheel piecesand the manner-of connecting the spring plank and supporting links tothe transoms insures a structure that is exceptionally strong; andanother very desirable feature of such a truck is the low cost ofmanufacturing the same due to the saving of metal in eliminating onepair of transoms, and also to the fact. that the wheel pieces andtransoms are so designed that they can be accurately fitted thatcomprises a single casting which consists of wheel pieces and a pair ofsingle 'transoms integrally connected together, the 'transoms beingreduced intermediate their ends; and integral lugs projecting downwardlyfrom the undersides of said transoms for supporting the links whichcarry the spring plank of the truck.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses, this 14th day of September, 1912.

- H. M. PFLAGER.

Witnesses M. P. SMITH, M. A. HANDEL.

